“Orlando and Katy had that new-relationship glow about them. They were cuddling and flirting with each other all night,” the source said.

Rumors first began circulating last month when the actor and the “Dark Horse” singer were seen cavorting at a Golden Globes after party.

“Katy and Orlando were standing in the back of the party and were aggressively flirting before leaving together. He wouldn’t stop staring at her and she laid on the charm,” another source told Page Six.